DR. WILLIAM G COSTELLO M.D.
NPI 1629227145
Emergency Medicine in Milledgeville, GA
About Dr. William G Costello M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM G COSTELLO M.D. (NPI 1629227145) is an individual emergency medicine provider in Milledgeville, Georgia, licensed in Georgia (061570) and active in the NPI registry since September 2008. He is enrolled in Medicare PECOS, is affiliated with Northern Light Maine Coast Hospital, and is a graduate of Boston University School Of Medicine (1989).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. William G Costello M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show William Costello reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Greensboro, GA 30642
- Reassigned Medicare billing, Georgia enrollment
- 58 clinicians in this Medicare group
Albany, GA 31701
- Reassigned Medicare billing, Georgia enrollment
- Medicare enrollment name: Phoebe Putney Memorial Hospital, Inc.
- 264 clinicians in this Medicare group
Newport, TN 37821
- Reassigned Medicare billing, Georgia enrollment
- 330 clinicians in this Medicare group
Ellsworth, ME 04605
- Reassigned Medicare billing, Maine enrollment
- 167 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Northern Light Maine Coast Hospital
Acute Care Hospitals · Ellsworth, MEPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 31061 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MILLEDGEVILLE, GA 31061
MILLEDGEVILLE, GA 31061
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is William Costello's NPI number?
The NPI number for William Costello is 1629227145. It was assigned to this individual provider in the NPPES registry on September 9, 2008.
Where is William Costello located?
William Costello practices at 821 N Cobb St, Milledgeville, GA 31061. The listed phone number is (478) 454-3795.
What is William Costello's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is William Costello enrolled in Medicare?
Yes. William Costello is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for William Costello's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Costello reassigns Medicare benefits to 4 organizations: Athens Clarke Medical Enterprises LLC (Greensboro, GA), Phoebe Cancer Center Surgical Oncology (Albany, GA), Emergency Coverage, LLC (Newport, TN) and Emergency Medicine Services Of Maine, LLC (Ellsworth, ME). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Costello's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Costello accept?
Health plans from Taro Health list William Costello as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is William Costello affiliated with any hospitals?
According to CMS data, William Costello is affiliated with Northern Light Maine Coast Hospital.
When was this NPI record last updated?
The NPPES record for William Costello was last updated on June 22, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. William G Costello, M.D. · NPI 1629227145
Emergency Medicine physician in Milledgeville, Georgia. Individual provider, active in the CMS NPPES registry since September 9, 2008.
## Identity
- **NPI:** 1629227145 (Entity type: Individual)
- **Enumerated:** September 9, 2008
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 061570 (Georgia)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 821 N COBB ST, Milledgeville, GA 31061-2343
- **Phone:** (478) 454-3795 · **Fax:** (478) 454-3969
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Athens Clarke Medical Enterprises LLC (NPI 1538791579, Greensboro, GA); Phoebe Cancer Center Surgical Oncology (NPI 1316193626, Albany, GA); Emergency Coverage, LLC (NPI 1427005008, Newport, TN); Emergency Medicine Services Of Maine, LLC (NPI 1578032058, Ellsworth, ME) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Boston University School Of Medicine, class of 1989
## Record status
- **NPPES last updated:** June 22, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1629227145) · Data from the CMS NPPES public registry.